[time-nuts] Ground loops in measurements?

Attila Kinali attila at kinali.ch
Mon May 20 08:08:03 EDT 2013


A couple of weeks ago, there was a short discussion on "bad" connectors
and cables and the coupled in noise of those. Summarized it said that
measurements in the time-nuts scale are very sensitive to even the lowest
noise levels and coupled in signals.

But, all the measurements we do are done using some sort of coax which
have their shield connected to the case of the devices. As the invovled
devices in a measurement are also grounded over their power supply
this will lead to ground loops and thus a 50/60Hz noise. Also, because
loops are good magnetic antennas, a lot of other noise floating around
in the ether is coupled in (eg a nearby radio station).

How do you handle this kind of problems?

			Attila Kinali

The people on 4chan are like brilliant psychologists
who also happen to be insane and gross.
		-- unknown

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